[clang] [Sema] Add `-fvisibility-global-new-delete=` option (PR #75364)

[via cfe-commits]

bd1976bris wrote:

> > I rebased the changes onto the latest main to resolve the merge conflicts - these were just textual not semantic.
> 
> You may like getcord/spr :) https://maskray.me/blog/2023-09-09-reflections-on-llvm-switch-to-github-pull-requests#my-workflow

Thanks for the link to the write up. Very much appreciated. I need to improve my workflow now that everything is via github. I don't have much time for GUI interfaces... you'll notice that I managed to repeat the header line in the commit comment when committing through the GUI: https://github.com/llvm/llvm-project/commit/27ce26b06655cfece3d54b30e442ef93d3e78ac7 🥇 

https://github.com/llvm/llvm-project/pull/75364